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소숫점: 1자리 덧셈15

1
1.5
+
7.4
=
8.9
2
8.5
+
1.5
=
10
3
9.4
+
4.5
=
13.9
4
2.2
+
2.4
=
4.6
5
2.8
+
3.4
=
6.2
6
1.8
+
9.3
=
11.1
7
7.7
+
2.5
=
10.2
8
1.3
+
4.4
=
5.7
9
4.6
+
1.1
=
5.7
10
9.4
+
4.8
=
14.2
11
4.4
+
7.4
=
11.8
12
9.1
+
1.1
=
10.2
13
2.5
+
7.2
=
9.7
14
3.3
+
5.2
=
8.5
15
1.3
+
1.7
=
3